WASP installation.

I am new to powershell and WASP. I try to run install.ps1 from WASP instalation folder. i got error msg

PS C:\Script\WASP> C:\Script\WASP\Install.ps1
You're running PowerShell 2.0, so you don't need to Install this as a PSSnapin, you can use Import-Module (or Add-Module in CTP2) to load it. If you still want to install it as a PSSnapin, re-run this script with -Force

May be am trying to install in a wronge way. Please reply me how to install or add this module to my Powershell.